diff --git a/python/melbank.py b/python/melbank.py
index c2fa09f..257cd3d 100644
--- a/python/melbank.py
+++ b/python/melbank.py
@@ -45,7 +45,7 @@ def hertz_to_mel(freq):
     mel : scalar or ndarray
         Mel-frequency value or ndarray in Mel
     """
-    return 2595.0 * log10(1 + (freq/700.0))
+    return 2595.0 * log10(1 + (freq / 700.0))
 
 
 def mel_to_hertz(mel):
@@ -59,7 +59,7 @@ def mel_to_hertz(mel):
     freq : scalar or ndarray
         Frequency value or array in Hz.
     """
-    return 700.0 * (10**(mel/2595.0)) - 700.0
+    return 700.0 * (10**(mel / 2595.0)) - 700.0
 
 
 def melfrequencies_mel_filterbank(num_bands, freq_min, freq_max, num_fft_bands):
@@ -84,7 +84,7 @@ def melfrequencies_mel_filterbank(num_bands, freq_min, freq_max, num_fft_bands):
     mel_max = hertz_to_mel(freq_max)
     mel_min = hertz_to_mel(freq_min)
     delta_mel = abs(mel_max - mel_min) / (num_bands + 1.0)
-    frequencies_mel = mel_min + delta_mel*arange(0, num_bands+2)
+    frequencies_mel = mel_min + delta_mel * arange(0, num_bands + 2)
     lower_edges_mel = frequencies_mel[:-2]
     upper_edges_mel = frequencies_mel[2:]
     center_frequencies_mel = frequencies_mel[1:-1]
@@ -130,19 +130,19 @@ def compute_melmat(num_mel_bands=12, freq_min=64, freq_max=8000,
             freq_min,
             freq_max,
             num_fft_bands
-    )
+        )
 
     len_fft = float(num_fft_bands) / sample_rate
     center_frequencies_hz = mel_to_hertz(center_frequencies_mel)
     lower_edges_hz = mel_to_hertz(lower_edges_mel)
     upper_edges_hz = mel_to_hertz(upper_edges_mel)
-    freqs = linspace(0.0, sample_rate/2.0, num_fft_bands)
+    freqs = linspace(0.0, sample_rate / 2.0, num_fft_bands)
     melmat = zeros((num_mel_bands, num_fft_bands))
 
     for imelband, (center, lower, upper) in enumerate(zip(
             center_frequencies_hz, lower_edges_hz, upper_edges_hz)):
 
-        left_slope = (freqs >= lower)  == (freqs <= center)
+        left_slope = (freqs >= lower) == (freqs <= center)
         melmat[imelband, left_slope] = (
             (freqs[left_slope] - lower) / (center - lower)
         )
@@ -152,4 +152,4 @@ def compute_melmat(num_mel_bands=12, freq_min=64, freq_max=8000,
             (upper - freqs[right_slope]) / (upper - center)
         )
 
-    return melmat, (center_frequencies_mel, freqs)
\ No newline at end of file
+    return melmat, (center_frequencies_mel, freqs)